Genotype III Saint Louis encephalitis virus outbreak, Argentina, 2005.
Comparison of Argentinean Saint Louis encephalitis virus non-epidemic and epidemic strain infections in an avian model.
Saint Louis encephalitis virus
neutralizing antibody titers detected in domestic birds * NtAb Host Samples P/T prevalence (%) Age (mo) Anser anser (goose) 4/5 80 > 12 Gallus gallus (chicken) 3/3 100 < 3 8/13 62 > 12 Host Range in NtAb titer Anser anser (goose) 1,280 ([dagger]) Gallus gallus (chicken) 1,280 ([dagger]) 20-1,280 * At residence of a patient with Saint Louis encephalitis, during outbreak in Cordoba, Argentina, February 2005.
Serum samples were screened for flavivirus-neutralizing antibodies by plaque-reduction neutralization test (PRNT) according to standard methods (11) and by using challenge inocula of 100 plaque-forming units (PFU) WNV strain NY99-4132 and Saint Louis encephalitis virus
(SLEV) strain TBH-28.
West Nile virus (WNV; family Flaviviridae, genus Flavivirus) is a member of the Japanese encephalitis virus complex, which also includes Japanese encephalitis virus, Saint Louis encephalitis virus
(SLEV), and Murray Valley encephalitis virus (1).
Neutralizing antibody titers to West Nile, Saint Louis encephalitis, Ilhbus, and Bussuquara viruses in serum samples from six horsesa PRN[T.sub.90] titer Horse WNV SLEV ILHV BSQV H-60 __(b) 20(b) __(b) -- H-117 320 -- __(b) -- H-126 >2,560 __(b) -- -- H-134 -- -- -- -- H-141 -- -- -- -- H-252 160 -- -- -- (a) WNV, West Nile virus; SLEV, Saint Louis encephalitis virus
; ILHV, Illheus virus; BSQV, Bussuquara virus; PRNT, plaque reduction neutralization test; -, <20.
The causative agent, SLEV (formal name: Saint Louis encephalitis virus
), is a member of the Flaviviridae family.